Unit 4-COS 4-Cellular Respiration & Photosynthesis (CH5)

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PHOTOSYNTHESIS & CELLULAR RESPIRATION
3. Identify reactants and products associated with photosynthesis and cellular respiration and the purposes of these two processes.

  • Identify the chemical formula for photosynthesis.

6 CO2 +6 H2O + Light ----→ 6(CH2O) + 6 O2
Carbon dioxide + water + Light -----> glucose sugar + oxygen

  • Identify the function of photosynthesis

Photosynthesis converts light energy into the chemical energy of sugars and other organic compounds

  • Identify the chemical formula for respiration.


    The simplified formula for aerobic cellular respiration is:


    C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy (asATP)


    The word equation for this is:


    Glucose (sugar) +Oxygen →Carbon dioxide +Water + Energy (asATP)

  • Identify the function of respiration.

Cellular respiration is what cells do to break up sugars into a form that the cell can use as energy. This happens in all forms of life. Cellular respiration takes in food and uses it to create ATP, a chemical which the cell uses for energy. Regular cellular respiration is aerobic (requires oxygen), but some simple organisms can only do anaerobic cellular respiration.

Is the process of making energy in both plant and animal cells. We can divide cellular respiration into three metabolic processes: glycolysis, the Krebs cycle, and oxidative phosphorylation. Each of these occurs in a specific region of the cell.

1. Glycolysis occurs in the cytosol.
  • 2. The Krebs cycle takes place in the matrix of the mitochondria.
  • 3. Oxidative phosphorylation via the electon transport chain is carried out on the inner mitochondrial membrane.
  • In the absence of oxygen, respiration consists of two metabolic pathways: glycolysis and fermentation. Both of these occur in the cytosol.


WEBQUEST LINKS FOR Photosynthesis and Cellular Respiration


Here is your handout for the Webquest assignment: Print it!
Lambert-ATP+Photosynthesis+and+Cell+Respiration+Web+quest.doc

Links for Webquest:

Cellular Respiration

Index to this page
Cellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water.
C6H12O6 + 6O2 + 6H2O → 12H2O + 6 CO2
The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell.
The process occurs in two phases:
  • glycolysis, the breakdown of glucose to pyruvic acid
  • the complete oxidation of pyruvic acid to carbon dioxide and water
In eukaryotes, glycolysis occurs in the cytosol. (Link to a discussion of glycolysis). The remaining processes take place in mitochondria.

Mitochondria

Mitochondria are membrane-enclosed organelles distributed through the cytosol of most eukaryotic cells. Their number within the cell ranges from a few hundred to, in very active cells, thousands. Their main function is the conversion of the potential energy of food molecules into ATP.
external image Mitochondrion.gif Mitochondria have:
  • an outer membranethat encloses the entire structure
  • an inner membrane that encloses a fluid-filled matrix
  • between the two is the intermembrane space
  • the inner membrane is elaborately folded with shelflike cristae projecting into the matrix.
  • a small number (some 5–10) circular molecules of DNA
external image mitochondrion.jpg
This electron micrograph (courtesy of Keith R. Porter) shows a single mitochondrion from a bat pancreas cell. Note the double membrane and the way the inner membrane is folded into cristae. The dark, membrane-bounded objects above the mitochondrion are lysosomes.
http://www.youtube.com/watch?v=iXmw3fR8fh0

‍How Glycolysis works:

‍http://glencoe.mcgraw-hill.com/sites/9834092339/student_view0/chapter7/how_glycolysis_works.html

‍Alcoholic Fermentation in Yeast:

‍http://www.indiana.edu/~oso/animations/glycolysis%20simplified.html


‍Overview of Cellular Respiration Labeling:

‍http://upload.wikimedia.org/wikipedia/commons/1/1d/Cellularrespiration.JPG



======Extra Credit Assignment!============The Gauntlet has been thrown, and the Cellular Respiration Challenge has been made! Here is the "Exercise your quads by exercising your brain!" Extra Credit Challenge! ======
Are you smart enough to label/explain all of these diagrams? Do you have what it takes?
Only the cream of the crop can pull it off!
Complete it for a 200 point extra credit grade.
You may work as a team of two or three,
but must get permission by Mrs. Lambert first! :-) Good Luck!
CELLULAR RESPIRATION IN MUSCLES-EXERCISE YOUR QUAD.dot

Academic Honesty Reminder: Showing your work to any other student(s) not pre-approved to be a part of your 2-3 Scientist Team will disqualify you from receiving your extra credit.
Concept Map-cellular_respiration handout.doc

(Instructions: print or copy by hand & fill out)
Photosynthesis & cellular respiration wordbank review.doc
Photosynthesis Walkthrough -Animation
 Cellular_Respiration__Releasing_Stored_Energy_By_Breaking_Down_Glucose